How to Reset a Smart TV: Restart, Soft Reset or Factory Reset

The home screen takes ages to appear, an app closes the moment it opens, the remote seems to be ignored for a few seconds after every press. A smart TV is a small computer bolted to a large panel, and like any computer it can get itself into a muddle after months of updates, installed apps and settings changed by different people in the house. The good news is that "reset" covers several very different actions, and the gentlest one fixes far more than people expect.

Three levels of reset

Before pressing anything, it helps to know what each option actually clears. They range from a few seconds of downtime to an hour of setting the television up again from scratch.

Start with a proper restart

Pressing the power button on the remote usually does not restart a smart TV at all. Most sets only go into standby, with the software kept running in the background so the screen wakes quickly. That is why a glitch can survive weeks of switching the TV "off" every night.

A real restart can be done in two ways:

• From the menu. Many TVs have a restart or reboot option under system, device preferences or support. Some also restart if you hold the power button on the remote for several seconds until the screen goes dark and the logo reappears.
• From the wall. Unplug the TV, leave it for a full minute so the internal power supply drains, then plug it back in and switch it on.

If the trouble involves a soundbar, streaming box or console as well, restart the whole chain together. Devices linked by HDMI talk to each other constantly, and the explainer on how HDMI-CEC lets devices share one remote shows why one confused box can make the TV seem faulty.

Reset only the part that is wrong

When the problem is clearly in the picture or the sound, there is no need to wipe the whole set. Picture menus normally include a reset for the current picture mode, and the sound menu has its own. This brings back the factory balance without touching apps or channels.

A screen with a cold, blue cast is a classic case. Before resetting anything, the steps for fixing a blue tint on a TV picture are worth a look, since the cause is often a single picture mode or color temperature setting.

Before a factory reset: a short checklist

A factory reset is thorough, which is exactly why it should be the last resort for a misbehaving TV. Take five minutes to prepare:

1. Write down the Wi-Fi network name and password, or plan to use a wired connection for setup.
2. Make a list of the apps you use and check that you know the sign-in details for each one.
3. Photograph any picture settings you tuned carefully, so you can put them back.
4. Note whether you use an aerial, cable or satellite input, because the channel scan will have to run again.
5. Find the TV's PIN if one was set. Many sets ask for it before they allow a reset; the manual lists the default code if nobody changed it.

Running the factory reset

The option usually lives under general settings, system, device preferences or support, with a name such as "reset", "factory data reset" or "restore to defaults". Select it, confirm, and let the TV work without unplugging it. The set restarts and opens the first-time setup screens: language, region, network, account sign-ins and a channel search.

If the menu is so unstable that you cannot reach the option, some televisions have a reset routine using buttons on the set itself or a pinhole button on the back. Because the method varies from model to model, the manual or the maker's support page is the place to check rather than guessing at button combinations.

When a reset does not help

Some problems are not software at all. A "no signal" message on one input points towards cables, ports and source devices, and the checklist for troubleshooting an HDMI no-signal message works through those in order. Lines across the panel, a screen that stays black while the sound plays or a TV that switches itself off repeatedly can be hardware faults. Those are a job for the manufacturer or a qualified repairer, since the inside of a television is not a safe place to experiment.

It also helps to keep expectations in proportion. Older smart TVs can feel slow simply because the apps have grown heavier than the hardware was built for. A history of how the living-room set changed, from text pages to smart-TV apps in Dutch living rooms, shows how much more today's screens are asked to do. In that case a reset brings a short lift, and an inexpensive plug-in streaming device may give the TV a longer second life.

Should I reset before selling a TV?

Yes. A factory reset signs the set out of every account, including any with stored payment details, so the next owner starts with a clean screen.